WO1993020382A1 - Metal pipe and process for producing the same - Google Patents

Metal pipe and process for producing the same Download PDF

Info

Publication number
WO1993020382A1
WO1993020382A1 PCT/DE1993/000299 DE9300299W WO9320382A1 WO 1993020382 A1 WO1993020382 A1 WO 1993020382A1 DE 9300299 W DE9300299 W DE 9300299W WO 9320382 A1 WO9320382 A1 WO 9320382A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
metal
support tube
metal pipe
support
Prior art date
Application number
PCT/DE1993/000299
Other languages
German (de)
French (fr)
Inventor
Heinrich Hampel
Original Assignee
Heinrich Hampel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heinrich Hampel filed Critical Heinrich Hampel
Publication of WO1993020382A1 publication Critical patent/WO1993020382A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/06—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves
    • B21D26/08—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves generated by explosives, e.g. chemical explosives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0006—Electron-beam welding or cutting specially adapted for particular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
    • B23K20/08—Explosive welding
    • B23K20/085—Explosive welding for tubes, e.g. plugging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/28—Seam welding of curved planar seams
    • B23K26/282—Seam welding of curved planar seams of tube sections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/02—Rigid pipes of metal

Definitions

  • a metal tube of the type concerned here in that the support tube is metallically connected to the inner tube at both ends over a length of at least half the wall thickness of the metal tube. This ensures a very reliable and durable surface seal between the support tube and the inner tube.
  • the metal tube according to the invention can also be designed such that the support tube is connected in a line-shaped or punctiform manner to the inner tube in the region between the connections existing at both ends. This allows, for example, the bending or torsional rigidity of the entire metal tube to be increased. This measure also increases the durability of the pipe lining.
  • the metal tube according to the invention can also be designed such that the inside of the support tube is lined with at least one further inner tube, which is metallically connected to the other inner tube at both ends over a length of at least half the wall thickness of the metal tube. Accordingly, it is possible to arrange a plurality of inner tubes on the inside of the support tube, which can have complementary, differing mechanical or thermal properties.
  • the metal tube according to the invention can also be designed such that the support tube is clad tightly from the outside with at least one outer tube and can thus be additionally protected from the outside.
  • the metal tube according to the invention can also be designed such that the inner tube / the inner tubes and / or the outer tube is / are made of a higher quality material than the support tube.
  • acid-resistant metals or materials with a particularly high mechanical strength come into consideration.
  • the metal tube according to the invention can also be designed such that the metallic connections are each produced by explosion, laser or electron welding.
  • the metal tube according to the invention can also be designed such that the support tube is formed in several parts in the axial direction.
  • the support tube in the axial Mid-range materials of relatively low quality on the other hand, higher-quality materials are used on the ends of the supporting tube, where, for example, the highest mechanical stresses occur due to the combination with other tubes.
  • the metal tube is then extremely corrosion-resistant and mechanically stable.
  • the support tube has at least one end a flange or a threaded end piece and that the flange or threaded end piece is made of a different, but in particular a higher quality material than the support tube.
  • the support pipe and the inner or outer pipes are pushed into one another and introduced into a vacuum space and then proceed in one go, from one end of the metal pipe to the other , the metallic Verbindun ⁇ gen at the ends and a snug fit of the inner and outer tubes or to the supporting tube by exp "Os ⁇ ve welding and forming are created. This is particularly important that alltechnisch ⁇ - steps for manufacturing the pipe can be done in one gear.
  • annular gap (s) between the support tube and the inner or outer tube (s) provision can be made for the annular gap (s) between the support tube and the inner or outer tube (s) to be sealed and evacuated, which from the inside or metal tube provided with at least one explosive charge is immersed in a water bath and then progressing in one move, from one end of the metal tube to the other, the metallic connections at the ends and a close-fitting fit of the inner or Outer tubes with the support tube are generated by explosive welding and forming.
  • the explosive welding and reshaping carried out in a water bath enables precise metering and equalization of the explosive force.
  • FIG. 1 shows an axial section through a multi-part metal tube with two flange end pieces
  • FIG 3 shows an axial section through a one-piece metal tube.
  • the metal tube shown in FIG. 1 is composed of a multi-part support tube 1, 2, 3 with a center piece 1 and flanges 2, 3 located at the ends, each of which is connected to one another via welds 4.
  • the flanges 2, 3 can be made of a mechanically stronger material than the center piece 1.
  • the support tube 1, 2, 3 is lined with an inner tube 5 which is tightly fitted on the inside.
  • the inner tube 5 can be made here from a particularly corrosion-resistant material.
  • the inner tube 5 is metallically connected to the support tube 1, 2, 3 by means of two-dimensional welds 6 located at the ends and by spot welds 7 in the intermediate area between the ends.
  • the welds 6 are in axial axial - o - tung extended to a length of at least half the wall thickness of the metal pipe.
  • the metal tube shown in FIG. 2 has a support tube 8, 9, 10, which is composed of a central piece 8 and two threaded end pieces 9, 10, the threaded end pieces 9, 10 being made of a higher quality, mechanically stronger material than the middle piece 8.
  • the individual pieces of pipe are connected to one another by means of welds 11.
  • the threaded end piece 9 has an internal thread 12, while the threaded end piece 10 has an external thread 13. Both types of thread are compatible, so that a longer pipe system can be assembled from this metal tube by screwing it to other metal tubes.
  • the support tube 8, 9, 10 can in this case be lined with two inner tubes 14, 15 which are each different in terms of material, and can be clad with an outer tube 16 which is closely fitting on the outside.
  • Corrosion-resistant or acid-resistant materials can be provided for both the inner tube 15 and the outer tube 16.
  • the two inner tubes 14, 15 and the outer tube 16 are also metallically connected to the support tube 8, 9, 10 via area welds 17, 18.
  • spot welds 19 are provided on the inner tubes 14, 15.
  • FIG. 3 shows a metal tube which is composed only of a one-piece support tube 20 and an inner tube 21, which can be metallically connected to the support tube 20 by area welds 22 located at the ends.
  • punctiform or linear connections can also be provided here in the intermediate area between the ends.
  • the welds 22 are extended in the axial direction over a length of at least half the wall thickness of the metal tube.
  • a tube of this simple design can serve, for example, as a semi-finished product for further processing.
  • any number of pipes of this type can also be easily made into longer pipes by conventional welding methods. Systems. Such pipe systems are then protected, for example, from the inside particularly effectively against corrosion.
  • a protective outer tube (not shown here) can also be provided here.
  • the support tube 1, 2, 3, 8, 9, 10, 20 can first be assembled from a center piece 1, 8 by conventional welding methods and, in the case of a multi-part tube, from two " end pieces 2, 3, 9, 10

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Fluid Mechanics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

Known metal pipes with inner and/or outer linings have the disadvantage that the fit between supporting pipe (1, 2, 3, 8, 9, 10, 20) and inner pipe (5, 14, 15, 21) or outer pipe (16), as well as the sealing of the individual pipes, which can only be ulteriorly applied, are mostly of unsatisfactory quality. A metal pipe avoids these disadvantages thanks to flat solder seams (6, 17, 18, 22) applied to the ends of the pipe and thanks to linear or punctual solders (7, 19) applied in the inner area of the pipe. Such pipes may thus be easily and economically produced in a single step. This metal pipe may be optimally assembled in any given circumstances.

Description

METALLROHR SOWIE VERFAHREN ZU SEINER HERSTELLUNG METAL PIPE AND METHOD FOR THE PRODUCTION THEREOF
Beschreibungdescription
Die Erfindung betrifft ein Metallröhr mit einem Durchmesser >= 40 mm aus einem Tragrohr, welches mit einem Innenrohr einer Wandstärke von 0,5 bis 5 mm eng anliegend ausgeklei¬ det ist, wobei der zwischen dem Innenrohr und dem Tragrohr befindliche Ringspalt an den Enden des MetalIrohres abge¬ dichtet ist, sowie ein Verfahren zur Herstellung dieses Me¬ tal 1rohres.The invention relates to a metal tube with a diameter> = 40 mm from a support tube, which is closely clad with an inner tube with a wall thickness of 0.5 to 5 mm, the annular gap located between the inner tube and the support tube at the ends of the Metal pipe is sealed, and a method for producing this metal pipe.
Aus der DE 39 41 739 A1 ist ein Verfahren zum Auskleiden von Rohren bekannt, mit dem ein Metallröhr der eingangs genannten Art hergestellt werden kann. Ein in dieser Weise hergestelltes Rohr hat allerdings den Nachteil, daß die Ab- dichtung zwischen dem Tragrohr und dem Innenrohr an den Rohrenden nicht von hoher Güte ist und überdies das nach¬ trägliche Abdichten nur sehr umständlich und unvollkommen durchgeführt werden kann.DE 39 41 739 A1 discloses a method for lining pipes, with which a metal pipe of the type mentioned at the beginning can be produced. A pipe produced in this way has the disadvantage, however, that the seal between the support pipe and the inner pipe at the pipe ends is not of high quality and, moreover, the subsequent sealing can only be carried out very laboriously and imperfectly.
Es ist daher die Aufgabe der vorliegenden Erfindung, ein Metallröhr anzugeben, das die genannten Nachteile vermei¬ det, sowie ein einfaches und wirtschaftliches Herstellungs¬ verfahren für dieses Rohr.It is therefore the object of the present invention to provide a metal tube which avoids the disadvantages mentioned, and a simple and economical production process for this tube.
Diese Aufgabe wird bei einem Metallröhr der hier betroffe¬ nen Art dadurch gelöst, daß das Tragrohr an beiden Enden über eine Länge von mindestens der halben Wandstärke des Metallrohres mit dem Innenrohr metallisch verbunden ist. Hierdurch ist eine sehr zuverlässige und haltbare flächen- hafte Abdichtung zwischen Tragrohr und Innenrohr gewährlei¬ stet. Das erfindungsgemäße Metallröhr kann ferner so ausgebildet sein, daß das Tragrohr im Bereich zwischen den an beiden Enden bestehenden Verbindungen linienförmig oder punktuell mit dem Innenrohr metallisch verbunden ist. Dadurch läßt sich be spielsweise die Biege- oder Torsionssteifigkeit des gesamten Metallrohres erhöhen. Ferner wird durch diese Ma߬ nahme die Haltbarkeit der Rohrauskleidung zusätzlich er-- höht.This object is achieved in a metal tube of the type concerned here in that the support tube is metallically connected to the inner tube at both ends over a length of at least half the wall thickness of the metal tube. This ensures a very reliable and durable surface seal between the support tube and the inner tube. The metal tube according to the invention can also be designed such that the support tube is connected in a line-shaped or punctiform manner to the inner tube in the region between the connections existing at both ends. This allows, for example, the bending or torsional rigidity of the entire metal tube to be increased. This measure also increases the durability of the pipe lining.
Das erfindungsgemäße Metallröhr kann ferner so ausgebildet sein, daß das Tragrohr innenseitig mit wenigstens einem weiteren Innenrohr ausgekleidet ist, das mit dem anderen Innenrohr an beiden Enden über eine Länge von mindestens der halben Wandstärke des Metallrohres metallisch verbunden ist. Es ist demnach mögl ch, auf der Innenseite des Trag¬ rohres mehrere Innenrohre anzuordnen, die sich ergänzende, voneinander abweichende mechanische oder thermische Eigen¬ schaften aufweisen können.The metal tube according to the invention can also be designed such that the inside of the support tube is lined with at least one further inner tube, which is metallically connected to the other inner tube at both ends over a length of at least half the wall thickness of the metal tube. Accordingly, it is possible to arrange a plurality of inner tubes on the inside of the support tube, which can have complementary, differing mechanical or thermal properties.
Das erfindungsgemäße Metallrohr kann weiter so ausgebildet sein, daß das Tragrohr von der Außenseite her mit wenig¬ stens einem Außenrohr eng anliegend verkleidet ist und da¬ mit auch nach außen zusätzlich geschützt werden kann.The metal tube according to the invention can also be designed such that the support tube is clad tightly from the outside with at least one outer tube and can thus be additionally protected from the outside.
Das erfindungsgemäße Metallröhr kann ferner so ausgebildet sein, daß das Innenrohr/die Innenrohre und/oder das Außen¬ rohr aus einem höherwertigen Werkstoff als das Tragrohr hergestellt ist/sind. Es kommen hier beispielsweise säure¬ feste Metalle oder Werkstoffe mit einer besonders hohen e- chanischen Festigkeit in Betracht.The metal tube according to the invention can also be designed such that the inner tube / the inner tubes and / or the outer tube is / are made of a higher quality material than the support tube. For example, acid-resistant metals or materials with a particularly high mechanical strength come into consideration.
Das erfindungsgemäße Metallröhr kann ferner so ausgebildet sein, daß die metallischen Verbindungen jeweils durch Ex- plosions-, Laser- oder Elektronenschwe en erzeugt sind.The metal tube according to the invention can also be designed such that the metallic connections are each produced by explosion, laser or electron welding.
Das erfindungsgemäße Metallröhr kann ferner so ausgebildet sein, daß das Tragrohr in axialer Richtung mehrteilig aus¬ gebildet ist. Hierbei können für das Tragrohr im axialen Mittelbereich Werkstoffe relativ niedriger Güte, dagegen an den Tragrohrenden, wo beispielsweise durch den Verbund mit anderen Rohren die höchsten mechanischen Beanspruchungen auftreten, höherwertige Werkstoffe verwendet werden. Zusam- men mit der Innen- bzw. Außenverkleidung ist das Metallröhr dann insgesamt äußerst korrosionsbeständig und mechanisch stabi1.The metal tube according to the invention can also be designed such that the support tube is formed in several parts in the axial direction. Here, for the support tube in the axial Mid-range materials of relatively low quality, on the other hand, higher-quality materials are used on the ends of the supporting tube, where, for example, the highest mechanical stresses occur due to the combination with other tubes. Together with the inner and outer cladding, the metal tube is then extremely corrosion-resistant and mechanically stable.
Bei einer sehr vorteilhaften Variante des erfindungsgemäßen Metallrohres kann auch vorgesehen sein, daß das Tragrohr an wenigstens einem Ende ein Flansch- oder ein Gewindeendstück hat und daß das Flansch- oder Gewindeendstück aus einem anderen, insbesondere aber einem höherwertigen Werkstoff als das Tragrohr hergestellt ist. Durch die Verwendung me- chanisch besonders stabiler Gewinde an den Rohrenden lassen sich aus den einzelnen Rohren längere Rohrsysteme zusammen¬ fügen, die sich insbesondere durch qualitativ hochwertige Verbindungen auszeichnen. Spezielle Werkstoffe für das Flansch- oder Gew ndeendstück sind Gegenstand der Unteran- Sprüche 10 und 11.In a very advantageous variant of the metal tube according to the invention it can also be provided that the support tube has at least one end a flange or a threaded end piece and that the flange or threaded end piece is made of a different, but in particular a higher quality material than the support tube. By using mechanically particularly stable threads at the pipe ends, longer pipe systems can be assembled from the individual pipes, which are characterized in particular by high-quality connections. Special materials for the flange or threaded end piece are the subject of subclaims 10 and 11.
Bei dem erfindungsgemäßen Verfahren zur Herstellung des hier betroffenen Metallrohres kann vorgesehen sein, daß das Tragrohr sowie das oder die Innen- bzw. Außenrohre ineinan- dergeschoben und in einen Vakuumraum eingebracht werden und daraufhin in einem Zuge, von einem Ende des Metallrohres bis zum anderen fortschreitend, die metallischen Verbindun¬ gen an den Enden und eine eng anliegende Passung des oder der Innen- bzw. Außenrohre mit dem Tragrohr durch exp"Osιve Verschweißung und Umformung erzeugt werden. Hierbei ist insbesondere von Bedeutung, daß sämtliche Verfahrenε- schritte zur Herstellung des Rohres in einem Gang erfolgen können.In the method according to the invention for producing the metal pipe concerned here, it can be provided that the support pipe and the inner or outer pipes are pushed into one another and introduced into a vacuum space and then proceed in one go, from one end of the metal pipe to the other , the metallic Verbindun¬ gen at the ends and a snug fit of the inner and outer tubes or to the supporting tube by exp "Osιve welding and forming are created. This is particularly important that all Verfahrenε- steps for manufacturing the pipe can be done in one gear.
Schließlich kann bei dem erf ndungsgemäßen Herstellungsver¬ fahren vorgesehen sein, daß der/die Ringspalt(e) zwischen dem Tragrohr und dem/den Innen- bzw. Außenrohr(en) abge¬ dichtet und evakuiert wird(werden) , das von innen bzw. außen mit wenigstens einer Sprengladung versehene Metall- rohr in ein Wasserbad eingetaucht wird und daraufhin in ei¬ nem Zuge, von einem Ende des Metallrohres bis zum anderen fortschreitend, die metallischen Verbindungen an den Enden und eine eng anliegende Passung des oder der Innen- bzw. Außenrohre mit dem Tragrohr durch explosive Verschwei ung und Umformung erzeugt werden. Die in einem Wasserbad durch¬ geführte explosive Verschweißung und Umformung ermöglicht eine genaue Dosierung sowie Vergleichmäßigung der Spreng- kra t.Finally, in the production method according to the invention, provision can be made for the annular gap (s) between the support tube and the inner or outer tube (s) to be sealed and evacuated, which from the inside or metal tube provided with at least one explosive charge is immersed in a water bath and then progressing in one move, from one end of the metal tube to the other, the metallic connections at the ends and a close-fitting fit of the inner or Outer tubes with the support tube are generated by explosive welding and forming. The explosive welding and reshaping carried out in a water bath enables precise metering and equalization of the explosive force.
Im folgenden wird das erfindungsgemäße Metallröhr anhand von drei besonders vorteilhaften Ausführungsformen erläu¬ tert. Es zeigtIn the following, the metal tube according to the invention is explained using three particularly advantageous embodiments. It shows
Fig. 1 einen Axialschnitt durch ein mehrteiliges Metall- rohr mit zwei Flanschendstücken,1 shows an axial section through a multi-part metal tube with two flange end pieces,
Fig. 2 einen Axialschnitt durch ein mehrteiliges Metal1- röhr mit zwei Gewindeendstücken und2 shows an axial section through a multi-part metal tube with two threaded end pieces and
Fig. 3 einen Axialschnitt durch ein einteiliges Metall- rohr.3 shows an axial section through a one-piece metal tube.
Das in Figur 1 dargestellte Metallröhr ist aus einem mehr¬ teiligen Tragrohr 1, 2, 3 mit einem Mittelstück 1 und je¬ weils an den Enden befindlichen Flanschen 2, 3 zusammenge¬ setzt, die über Schweißnähte 4 jewe ls miteinander verbun¬ den sind. Die Flansche 2, 3 können aus einem mechanisch fe- steren Werkstoff gefertigt sein als das Mittelstück 1. Zusätzlich ist das Tragrohr 1, 2, 3 mit einem innenseitig eng anliegenden Innenrohr 5 ausgekleidet. Das Innenrohr 5 kann hier aus einem besonders korrosionsfesten Werkstoff gefertigt sein. Das Innenrohr 5 ist durch an den Enden be- findliche flächenhafte Verschweißungen 6 sowie durch in dem Zwischenbereich zwischen den Enden punktuell ausgeführte Verschweißungen 7 mit dem Tragrohr 1, 2, 3 metallisch ver¬ bunden. Die Verschweißungen 6 sind dabei in axialer Rieh- - o - tung üoer eine Länge von mindestens der halben Wandstärke des Metallrohres ausgedehnt.The metal tube shown in FIG. 1 is composed of a multi-part support tube 1, 2, 3 with a center piece 1 and flanges 2, 3 located at the ends, each of which is connected to one another via welds 4. The flanges 2, 3 can be made of a mechanically stronger material than the center piece 1. In addition, the support tube 1, 2, 3 is lined with an inner tube 5 which is tightly fitted on the inside. The inner tube 5 can be made here from a particularly corrosion-resistant material. The inner tube 5 is metallically connected to the support tube 1, 2, 3 by means of two-dimensional welds 6 located at the ends and by spot welds 7 in the intermediate area between the ends. The welds 6 are in axial axial - o - tung extended to a length of at least half the wall thickness of the metal pipe.
Das in Fig. 2 dargestellte Metallröhr hat ein Tragrohr 8, 9, 10, das sich aus einem Mittelstück 8 sowie zwei Gewin¬ deendstücken 9, 10 zusammensetzt, wobei die Gewindeend¬ stücke 9, 10 aus einem höherwertigen, mechanisch festeren Werkstoff gefertigt sind als das Mittelstück 8. Die einzel¬ nen Rohrstücke sind mittels Verschwei ungen 11 miteinander verbunden. Das Gewindeendstück 9 weist ein Innengewinde 12 auf, dagegen das Gewindeendstück 10 ein Außengewinde 13. Beide Gewindetypen sind kompatibel, so daß aus diesem Me¬ tallröhr durch Verschraubung mit weiteren Metallröhren ein längeres Rohrsystem zusammengesetzt werden kann. Das Trag- röhr 8, 9, 10 kann hierbei sowohl mit zwei jeweils werkstofflich unterschiedlichen Innenrohren 14, 15 eng an¬ liegend ausgekleidet als auch mit einem außen eng anliegen¬ den Außenrohr 16 verkleidet sein. Sowohl für das Innenrohr 15 als auch das Außenrohr 16 können korrosions- oder säure- feste Werkstoffe vorgesehen sein. Die beiden Innenrohre 14, 15 und das Außenrohr 16 sind ebenfalls über flächenhafte Verschweißungen 17, 18 mit dem Tragrohr 8, 9, 10 metallisch verbunden. Zusätzlich sind punktuelle Verschweißungen 19 an den Innenrohren 14, 15 vorgesehen.The metal tube shown in FIG. 2 has a support tube 8, 9, 10, which is composed of a central piece 8 and two threaded end pieces 9, 10, the threaded end pieces 9, 10 being made of a higher quality, mechanically stronger material than the middle piece 8. The individual pieces of pipe are connected to one another by means of welds 11. The threaded end piece 9 has an internal thread 12, while the threaded end piece 10 has an external thread 13. Both types of thread are compatible, so that a longer pipe system can be assembled from this metal tube by screwing it to other metal tubes. The support tube 8, 9, 10 can in this case be lined with two inner tubes 14, 15 which are each different in terms of material, and can be clad with an outer tube 16 which is closely fitting on the outside. Corrosion-resistant or acid-resistant materials can be provided for both the inner tube 15 and the outer tube 16. The two inner tubes 14, 15 and the outer tube 16 are also metallically connected to the support tube 8, 9, 10 via area welds 17, 18. In addition, spot welds 19 are provided on the inner tubes 14, 15.
Figur 3 zeigt ein Metallrohr, das sich lediglich aus einem einteiligen Tragrohr 20 und einem Innenrohr 21, welches durch an den Enden befindliche flächenhafte Verschweißungen 22 mit dem Tragrohr 20 metallisch verbunden sein kann zu- sammensetzt. Es können hier allerdings auch im Zwischenbe¬ reich zwischen den Enden punktuelle oder 1inienförmige Ver¬ bindungen (s. Fig. 1 oder 2) vorgesehen sein. Die Ver¬ schweißungen 22 sind in axialer Richtung über eine Länge von mindestens der halben Wandstärke des Metallrohres aus- gedehnt. Ein Rohr dieser einfachen Ausführung kann bei¬ spielsweise als Halbzeug zur Weiterverarbeitung dienen. Es können aber auch beliebig viele derartige Rohre in einfa¬ cher Weise durch übliche Schweißmethoden zu längeren Rohr- Systemen zusammengesetzt werden. Derartige Rohrsysteme sind dann beispielsweise von der Innenseite her besonders wii— kungsvoll gegen Korrosion geschützt. Es kann jedoch auch hier zusätzlich ein schützendes Außenrohr (hier nicht ge- zeigt) vorgesehen sein.FIG. 3 shows a metal tube which is composed only of a one-piece support tube 20 and an inner tube 21, which can be metallically connected to the support tube 20 by area welds 22 located at the ends. However, punctiform or linear connections (see FIG. 1 or 2) can also be provided here in the intermediate area between the ends. The welds 22 are extended in the axial direction over a length of at least half the wall thickness of the metal tube. A tube of this simple design can serve, for example, as a semi-finished product for further processing. However, any number of pipes of this type can also be easily made into longer pipes by conventional welding methods. Systems. Such pipe systems are then protected, for example, from the inside particularly effectively against corrosion. However, a protective outer tube (not shown here) can also be provided here.
Zur Herstellung des erfindungsgemäßen Metallrohres kann zunächst das Tragrohr 1, 2, 3, 8, 9, 10, 20 durch übliche Schweißmethoden aus einem Mittelstück 1, 8 sowie im Falle eines mehrteiligen Rohres aus zwei" Endstücken 2, 3, 9, 10 zusammengesetzt werden. Danach kann dieses Tragrohr 1, 2, 3, 8, 9, 10, 20 sowie das oder die Innen- 5, 14, 15, 21 bzw. Außenrohre 16 ineinandergeschoben und in einen Vaku¬ umraum (hier nicht dargestellt) eingebracht werden und dar- aufhin in einem Zuge, von einem Ende des Metallrohres bis zum anderen fortschreitend, die metallischen Verbindungen an den Enden und eine eng anliegende Passung des oder der Innen- 5, 14, 15, 21 bzw. Außenrohre 16 mit dem Tragrohr 1, 2, 3, 8, 9, 10, 20 durch explosive Verschweißung und Umfor- mung erzeugt werden. Anstelle des Einbringens des Metall- rohres in einen Vakuumraum kann die explosive Verschweißung und Umformung nach einer Evakuierung des Ringspaltes (hier nicht dargestellt) zwischen den Rohren 1, 2, 3, 5, 8, 9, 10, 14, 15, 16 auch in einem Wasserbad (hier nicht darge- stellt) durchgeführt werden. To produce the metal tube according to the invention, the support tube 1, 2, 3, 8, 9, 10, 20 can first be assembled from a center piece 1, 8 by conventional welding methods and, in the case of a multi-part tube, from two " end pieces 2, 3, 9, 10 This support tube 1, 2, 3, 8, 9, 10, 20 and the inner tube (s) 5, 14, 15, 21 or outer tube 16 can then be pushed into one another and introduced into a vacuum space (not shown here) and thereupon in one go, progressing from one end of the metal tube to the other, the metallic connections at the ends and a close-fitting fit of the inner tube 5, 14, 15, 21 or outer tube 16 with the support tube 1, 2 , 3, 8, 9, 10, 20 are generated by explosive welding and forming, instead of inserting the metal pipe into a vacuum space, the explosive welding and forming after evacuation of the annular gap (not shown here) between the pipes 1 , 2, 3, 5, 8, 9, 10, 14, 15, 16 can also be carried out in a water bath (not shown here).

Claims

Ansprüche Expectations
1. Metallrohr mit einem Durchmesser >= 40 mm aus ei¬ nem Tragrohr, welches mit einem Innenrohr einer Wandstärke von 0,5 bis 5 mm eng anliegend ausgekleidet ist, wobei der zwischen dem Innenrohr und dem Tragrohr befindliche Ringspalt an den Enden des Metallrohres abgedichtet ist, dadurch gekennzeichnet, daß das Tragrohr (1, 2, 3, 8, 9, 10, 20) an beiden Enden über eine Länge von mindestens der halben Wandstärke des Metallrohres mit dem Innenrohr (5,1. Metal tube with a diameter> = 40 mm from a support tube which is lined closely with an inner tube with a wall thickness of 0.5 to 5 mm, the annular gap located between the inner tube and the support tube sealing at the ends of the metal tube characterized in that the support tube (1, 2, 3, 8, 9, 10, 20) is connected to the inner tube (5, 2) at both ends over a length of at least half the wall thickness of the metal tube.
14, 15, 21) metallisch verbunden ist.14, 15, 21) is metallically connected.
2. Metallrohr nach Anspruch 1, dadurch gekennzeich¬ net, daß das Tragrohr (1, 2, 3, 8, 9, 10, 20) im Bereich zwischen den an beiden Enden bestehenden Verbindungen linienförmig oder punktuell mit dem Innenrohr (5, 14, 15, 21) metallisch verbunden ist.2. Metal pipe according to claim 1, characterized gekennzeich¬ net that the support tube (1, 2, 3, 8, 9, 10, 20) in the area between the connections existing at both ends linear or punctiform with the inner tube (5, 14, 15, 21) is metallically connected.
3. Metallrohr nach Anspruch 1 oder 2, dadurch ge¬ kennzeichnet, daß das Tragrohr (1, 2, 3, 8, 9, 10, 20) innenseitig mit wenigstens einem weiteren Innenrohr (5, 14,3. Metal tube according to claim 1 or 2, characterized ge indicates that the support tube (1, 2, 3, 8, 9, 10, 20) on the inside with at least one further inner tube (5, 14,
15, 21) ausgekleidet ist, das mit dem anderen Innenrohr (5, 14, 15, 21) an beiden Enden über eine Länge von mindestens der halben Wandstärke des Metallrohres metallisch verbunden ist.15, 21) which is metallically connected to the other inner tube (5, 14, 15, 21) at both ends over a length of at least half the wall thickness of the metal tube.
4. Metallrohr nach einem der vorhergehenden Ansprü- ehe, dadurch gekennzeichnet, daß das Tragrohr (1, 2, 3, 8,4. Metal tube according to one of the preceding claims, characterized in that the support tube (1, 2, 3, 8,
9, 10, 20) von der Außenseite her mit wenigstens einem Außenrohr (16) eng anliegend verkleidet ist.9, 10, 20) is clad tightly from the outside with at least one outer tube (16).
5. Metallrohr nach einem der vorhergehenden Ansprü- ehe, dadurch gekennzeichnet, daß das Innenrohr/die Innen¬ rohre (5, 14, 15, 21) und/oder das Außenrohr (16) aus einem höherwertigen Werkstoff als das Tragrohr (1, 2, 3, 8, 9,5. Metal tube according to one of the preceding claims, characterized in that the inner tube / the inner tubes (5, 14, 15, 21) and / or the outer tube (16) made of a higher quality material than the support tube (1, 2nd , 3, 8, 9,
10, 20) hergestellt ist/sind. 10, 20) is / are.
6. Metallrohr nach einem der vorhergehenden Ansprü¬ che, dadurch gekennzeichnet, daß die metallischen Verbindungen jeweils durch Explosions-, Laser- oder Elektronenschweißen erzeugt sind.6. Metal pipe according to one of the preceding Ansprü¬ che, characterized in that the metallic connections are each generated by explosion, laser or electron welding.
7. Metallrohr nach einem der vorhergehenden Ansprü¬ che, dadurch gekennzeichnet, daß das Tragrohr (1, 2, 3, 8, 9, 10, 20) in axialer Richtung mehrteilig ausgebildet ist.7. Metal tube according to one of the preceding Ansprü¬ surface, characterized in that the support tube (1, 2, 3, 8, 9, 10, 20) is formed in several parts in the axial direction.
8. Metallrohr nach Anspruch 7, dadurch gekennzeich¬ net, daß das Tragrohr (1, 2, 3, 8, 9, 10, 20) an wenigstens einem Ende ein Flansch- (2, 3) oder ein Gewindeendstück (9, 10) hat.8. Metal pipe according to claim 7, characterized gekennzeich¬ net that the support tube (1, 2, 3, 8, 9, 10, 20) at least one end a flange (2, 3) or a threaded end piece (9, 10) Has.
9. Metallrohr nach Anspruch 8, dadurch gekennzeich¬ net, daß das Flansch- (2, 3) oder Gewindeendstück (9 , 10) aus einem anderen, insbesondere aber einem höherwertigen Werkstoff als das Tragrohr (1, 2, 3, 8, 9, 10, 20) herge- stellt ist.9. Metal pipe according to claim 8, characterized gekennzeich¬ net that the flange (2, 3) or threaded end piece (9, 10) made of a different, but in particular a higher quality material than the support tube (1, 2, 3, 8, 9th , 10, 20) is produced.
10. Metallrohr nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß das Flansch- (2, 3) oder Gewindeend¬ stück (9 , 10) aus einem hochfesten Werkstoff, beispiels- weise hochfesten Stahl, hergestellt ist.10. Metal pipe according to claim 8 or 9, characterized in that the flange (2, 3) or threaded end piece (9, 10) is made of a high-strength material, for example high-strength steel.
11. Metallrohr nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß das Flansch- (2, 3) oder Gewindeend¬ stück (9 , 10) aus dem Werkstoff des Liners hergestellt ist.11. Metal pipe according to claim 8 or 9, characterized in that the flange (2, 3) or threaded end piece (9, 10) is made of the material of the liner.
12. Verfahren zur Herstellung eines Metallrohres ge¬ mäß einem der vorhergehenden Ansprüche, dadurch gekenn¬ zeichnet, daß das Tragrohr sowie das oder die Innen- bzw. Außenrohre neinandergeschoben und in einen Vakuumraum ein¬ gebracht werden und daraufhin in einem Zuge, von einem Ende des Metallrohres bis zum anderen fortschreitend, die metal¬ lischen Verbindungen an den Enden und eine eng anliegende Passung des oder der Innen- bzw. Außenrohre mit dem Trag¬ rohr durch explosive Verschweißung und Umformung erzeugt werden.12. A method for producing a metal tube ge according to one of the preceding claims, characterized gekenn¬ characterized in that the support tube and the one or more inner or outer tubes are pushed one another and brought into a vacuum space and then in one go, from one end progressing from the metal pipe to the other, the metallic connections at the ends and a close-fitting one Fit of the inner or outer tubes with the support tube are generated by explosive welding and forming.
13. Verfahren nach Anspruch 12, dadurch gekennzeich¬ net, daß der/die Ringspalt(e) zwischen dem Tragrohr und dem/den Innen- bzw. Außenrohr(en) abgedichtet und evakuiert wird(werden), das von innen bzw. außen mit wenigstens einer Sprengladung versehene Metallrohr in ein Wasserbad einge- taucht wird und daraufhin in einem Zuge, von einem Ende des Metallrohres bis zum anderen fortschreitend, die metalli¬ schen Verbindungen an den Enden und eine eng anliegende Passung des oder der Innen- bzw. Außenrohre mit dem Trag¬ rohr durch explosive Verschwei ung und Umformung erzeugt werden. 13. The method according to claim 12, characterized gekennzeich¬ net that the / the annular gap (s) between the support tube and the / the inner or outer tube (s) is sealed and evacuated, the inside or outside with at least one explosive charge provided with a metal tube is immersed in a water bath and then progressing in one go, from one end of the metal tube to the other, with the metallic connections at the ends and a tight fit of the inner or outer tubes the support tube are generated by explosive welding and forming.
PCT/DE1993/000299 1992-03-31 1993-03-31 Metal pipe and process for producing the same WO1993020382A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4210547.1 1992-03-31
DE4210547A DE4210547C1 (en) 1992-03-31 1992-03-31

Publications (1)

Publication Number Publication Date
WO1993020382A1 true WO1993020382A1 (en) 1993-10-14

Family

ID=6455533

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1993/000299 WO1993020382A1 (en) 1992-03-31 1993-03-31 Metal pipe and process for producing the same

Country Status (2)

Country Link
DE (1) DE4210547C1 (en)
WO (1) WO1993020382A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004103603A1 (en) * 2003-05-20 2004-12-02 Cladtek International Pty Ltd Production of clad pipes
CN105135071A (en) * 2015-08-25 2015-12-09 江苏众信绿色管业科技有限公司 Method for manufacturing double-metal composite pipe
US11437767B2 (en) 2010-11-22 2022-09-06 Commscope Technologies Llc Connector and coaxial cable with molecular bond interconnection
US11462843B2 (en) 2010-11-22 2022-10-04 Commscope Technologies Llc Ultrasonic weld interconnection coaxial connector and interconnection with coaxial cable

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6977355B2 (en) 1997-01-14 2005-12-20 Walter Duley Tailored blank
GB9700652D0 (en) * 1997-01-14 1997-03-05 Powerlasers Ltd Composite tailored blank
CN1052785C (en) * 1998-07-24 2000-05-24 侯贤忠 GRP-thin wall stainless steel composite pipe and its making process
DE102005021769A1 (en) 2005-05-11 2006-11-23 Sms Demag Ag Method and device for selectively influencing the Vorbandgeometrie in a roughing stand
US9728926B2 (en) 2010-11-22 2017-08-08 Commscope Technologies Llc Method and apparatus for radial ultrasonic welding interconnected coaxial connector
US9768574B2 (en) 2010-11-22 2017-09-19 Commscope Technologies Llc Cylindrical surface spin weld apparatus
US9761959B2 (en) 2010-11-22 2017-09-12 Commscope Technologies Llc Ultrasonic weld coaxial connector
US8826525B2 (en) * 2010-11-22 2014-09-09 Andrew Llc Laser weld coaxial connector and interconnection method
GB2528713B (en) * 2014-07-30 2017-10-25 Technip France Method of manufacturing a bi-metallic mechanically lined pipe
CN105090627A (en) * 2015-08-25 2015-11-25 江苏众信绿色管业科技有限公司 Bimetal composite pipe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943387A (en) * 1957-10-24 1960-07-05 Lukens Steel Co Process of circumferentially welding steel pipe
GB1244938A (en) * 1969-03-12 1971-09-02 Steel Co Of Wales Ltd Improvements in and relating to lined pipes and vessels
US4026583A (en) * 1975-04-28 1977-05-31 Hydril Company Stainless steel liner in oil well pipe
DE2714052A1 (en) * 1977-03-30 1978-10-05 Fraunhofer Ges Forschung Non-corrosive liner for steel tube - has flanges at each end of liner expanded and attached to outer sleeve by explosive welding
DE2905071A1 (en) * 1979-02-10 1980-08-14 Jakobs & Co Gmbh Double-wall conduit pipe - has lining formed by surface hardened steel strip bent into cylinder with butting edges
DE3941739A1 (en) * 1989-12-18 1991-06-20 Hampel Heinrich Tube inner cladding - is inner tube bonded into place by explosive distortion

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943387A (en) * 1957-10-24 1960-07-05 Lukens Steel Co Process of circumferentially welding steel pipe
GB1244938A (en) * 1969-03-12 1971-09-02 Steel Co Of Wales Ltd Improvements in and relating to lined pipes and vessels
US4026583A (en) * 1975-04-28 1977-05-31 Hydril Company Stainless steel liner in oil well pipe
DE2714052A1 (en) * 1977-03-30 1978-10-05 Fraunhofer Ges Forschung Non-corrosive liner for steel tube - has flanges at each end of liner expanded and attached to outer sleeve by explosive welding
DE2905071A1 (en) * 1979-02-10 1980-08-14 Jakobs & Co Gmbh Double-wall conduit pipe - has lining formed by surface hardened steel strip bent into cylinder with butting edges
DE3941739A1 (en) * 1989-12-18 1991-06-20 Hampel Heinrich Tube inner cladding - is inner tube bonded into place by explosive distortion

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004103603A1 (en) * 2003-05-20 2004-12-02 Cladtek International Pty Ltd Production of clad pipes
CN100364685C (en) * 2003-05-20 2008-01-30 克拉德泰克国际有限公司 Production of clad pipes
US11437767B2 (en) 2010-11-22 2022-09-06 Commscope Technologies Llc Connector and coaxial cable with molecular bond interconnection
US11437766B2 (en) 2010-11-22 2022-09-06 Commscope Technologies Llc Connector and coaxial cable with molecular bond interconnection
US11462843B2 (en) 2010-11-22 2022-10-04 Commscope Technologies Llc Ultrasonic weld interconnection coaxial connector and interconnection with coaxial cable
US11735874B2 (en) 2010-11-22 2023-08-22 Commscope Technologies Llc Connector and coaxial cable with molecular bond interconnection
US11757212B2 (en) 2010-11-22 2023-09-12 Commscope Technologies Llc Ultrasonic weld interconnection coaxial connector and interconnection with coaxial cable
CN105135071A (en) * 2015-08-25 2015-12-09 江苏众信绿色管业科技有限公司 Method for manufacturing double-metal composite pipe

Also Published As

Publication number Publication date
DE4210547C1 (en) 1993-06-03

Similar Documents

Publication Publication Date Title
WO1993020382A1 (en) Metal pipe and process for producing the same
DE3001666A1 (en) CORRUGATED STAINLESS STEEL PIPE AND METHOD FOR PRODUCING THE SAME
WO2017121592A1 (en) Assembly comprising at least two components of an exhaust system and method for joining
EP0575395B1 (en) Double-walled pressure vessel and process for manufacturing it
DE1297965B (en) Process for the production of welded transition pieces
DE102010014573A1 (en) Method for producing a vehicle silencer and vehicle silencer
DE10027703B4 (en) Method and apparatus for forming, in particular extrusion molding of a metallic workpiece
EP0222855B1 (en) Method for fabricating a hose adapter for threaded or nested nipples subjected to hydraulic loads
EP1464566B1 (en) Method of manufacturing a hollow element with a closed cross-section and a reinforcement
DE2111349A1 (en) Nuclear reactor fuel element
DE2456841A1 (en) METHOD OF WELDING A FLANGE TO A CAST-IRON PIPE AND CAST-IRON PIPE WITH A WELDED FLANGE
DE19757946C2 (en) pipe connection
DE102021103689B3 (en) Method for producing a stepped cross-sectional reduction in a one-piece tubular metal workpiece, one-piece tubular workpiece produced therewith and apparatus for carrying out the method
DE2232692A1 (en) Polygon aluminium tube drawing die - comprises several steps
DE19815244A1 (en) Hollow metal body forming method for hydraulic fluid line connections, such as for automobile hydraulics
DE4216090A1 (en) Duo-pipe exhaust system for vehicle - uses sliding seat to form connection between two sections of inner pipe
CH362890A (en) Fastening a metallic corrugated pipe in a metallic connector and method for producing the fastening
WO2015043968A1 (en) Method for producing a connection element, and connection element
DE102011107450A1 (en) Device for reshaping tube, comprises main clamping jaw arrangement for clamping primary portion of tube, and symmetric expansion tool for symmetric expansion of the end portions of tube
DE19832288B4 (en) Method for producing a connecting element
DE102013000920B4 (en) Component, in particular pull and / or push rod, and method for forming such a component
EP0348685B1 (en) Weld joint between a flexible metal tube and a hollow cylindrical metal joining piece
DE1646989C (en) Vacuum-tight connection between a ceramic tube and a disc-shaped metal part of an electrical discharge vessel
DE10021809C1 (en) Joining system, for pipe in flanged connector, comprises welding to produce bead between end of connector and outer wall of pipe, recess behind bead being filled with second material to increase impact strength of joint
WO2020249347A1 (en) Press ring and fitting for connecting pipes

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR CA CZ HU PL RU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA